Grizzly G0821, Owner'S Manual

Page: 28 / 52

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Model G0821 (Mfd. Since 03/18)
Rotating/Changing
Cutterhead Inserts
Figure 33. Location of cutterhead inserts and
Torx screws.
Cutterhead
Insert
Torx
Screw
The spiral cutterhead is equipped with 4-sided
indexable carbide inserts. Each insert can be
rotated and re-installed to use any one of its four
cutting edges. Therefore, if one cutting edge
becomes dull or damaged, simply rotate it 90˚ (as
shown below) to use a sharp cutting edge.
The inserts have a reference dot on one corner.
The position of the reference dot on installed
inserts can be used to track which edges are
sharp/unused and which edges are dull or dam-
aged. Replace inserts once the reference dot
would be rotated back to its original position.
Reference Dot
Figure 32. Insert rotating sequence.
Tools Needed Qty
Phillips Screwdriver #2 ...................................... 1
Torque Wrench .................................................. 1
Torx Bit T-25 ...................................................... 1
Precision Straightedge ...................................... 1
7. Remove Torx screw and insert, then carefully
clean away all dust and debris from insert
and insert pocket in cutterhead.
Note: This step is critical for achieving a
smooth finish with cutting operations. Dirt or
dust trapped under insert during installation
will slightly raise insert in cutterhead, which
will leave marks on workpiece after jointing.
Tip: Use low-pressure compressed air or
vacuum nozzle to clean cutterhead pocket.
8. Re-install insert with a sharp cutting edge
facing outward. Make sure insert is properly
seated in cutterhead pocket before securing.
— If all four insert cutting edges have been
used, replace insert with a new one. Always
position reference dot in same position
when installing a new insert to aid in rota-
tional sequencing.
9. Lubricate Torx screw threads with a small
amount of light machine oil, wipe excess off,
and torque screw to 48–50 inch/pounds.
Note: If too much oil is applied to the threads,
excess will attempt to squeeze out of thread-
ed hole as you install insert and force it to
raise slightly, making it out of alignment.
To rotate or replace spiral cutterhead insert:
1. DISCONNECT MACHINE FROM POWER!
2. Remove cutterhead guard from table, and
lower infeed table as far as it will go to pro-
vide access to cutterhead.
3. Remove cabinet bottom access panel to
expose cutterhead pulley.
4. Rotate cutterhead pulley to provide access to
insert(s) to be rotated/replaced.
5. Put on heavy leather gloves to protect fingers
and hands.
6. Remove any sawdust or debris from head of
insert, Torx screw, and surrounding area (see
Figure 33).